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(11)

EP 4 168 842 A1

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(43) Date of publication: 26.04.2023 Bulletin 2023/17 (21) Application number: 21829393.4 (22) Date of filing: 22.06.2021

(51) International Patent Classification (IPC):  G02B 7/02(2021.01) G02B 13/18(2006.01) G02B 13/06(2006.01) G03B 37/04(2021.01) (52) Cooperative Patent Classification (CPC): G02B 13/06; G03B 37/04; G02B 7/008; G02B 7/021; G02B 7/023; G02B 9/64; G02B 27/0018 (86) International application number: PCT/US2021/038552 (87) International publication number: WO 2021/262768 (30.12.2021 Gazette 2021/52)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 23.06.2020 WO PCT/US2020/039201 23.06.2020 WO PCT/US2020/039200 23.06.2020 WO PCT/US2020/039197 22.12.2020 WO PCT/US2020/066702 09.02.2021 WO PCT/US2021/017284 04.05.2021 US 202163183961 P (71) Applicant: Circle Optics, Inc. Rochester, NY 14604 (US)

(72) Inventors: MUIR, Christopher M. Rochester, NY 14618 (US) KURTZ, Andrew F. Macedon, NY 14502 (US) BIDWELL, Thomas Bergen, NY 14416 (US) INSKIP, Adam Derbyshire S42 6TP (GB) LEAP, Karen Niskayuna, NY 12309 (US) KINGSTON, Nils White River Junction, VT 05001 (US) (74) Representative: Herrero & Asociados, S.L.  Cedaceros, 1 28014 Madrid 28014 Madrid (ES)